4:101 wa idhaa Darabtum fiyl arDi falaysa 'Alaykum junaaHun an taqSuruu minaS Salaah* in khiftum ay yaftinakumul-ladhiyna kafaruu* in-nal kaafiriyna kaanuu lakum 'Aduw-wam mubiynaa

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Ahmed Raza Khan: Mohammed Aqib Qadri:
And when you travel in the land, it is no sin for you to curtail some of your obligatory prayers; if you fear that disbelievers may cause you harm; undoubtedly the disbelievers are open enemies to you.

Yusuf Ali:
When ye travel through the earth, there is no blame on you if ye shorten your prayers, for fear the Unbelievers May attack you: For the Unbelievers are unto you open enemies.

Pickthal:
And when ye go forth in the land, it is no sin for you to curtail (your) worship if ye fear that those who disbelieve may attack you. In truth the disbelievers are an open enemy to you.